Finding the Third Proportional to 10,921,898 and 18,200,980

Step by Step Solution

1. Step 1: Write the proportion equation
   10,921,898 : 18,200,980 = 18,200,980 : x
2. Step 2: Convert to fraction form
   10,921,898/18,200,980 = 18,200,980/x
3. Step 3: Cross multiply
   10,921,898x = 18,200,980 × 18,200,980
4. Step 4: Simplify right side
   10,921,898x = 331,275,672,960,400
5. Step 5: Solve for x
   x = 331,275,672,960,400/10,921,898
6. Step 6: Final answer
   x = 30,331,328.21